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to measure the height of the plants before and after adding the composted material. Leave some plants without compost as controls. Ask students to make a chart of their results each week for at least three weeks.
While trash bags are meant to make handling trash easier, they also make up a large portion of the waste in landfills. This project will determine which trash bag Coach factory flash sale decomposes fastest. You'll need a brown grocery sack, trash bag, plastic grocery bag coach sale dates and bag labeled biodegradable. Cut the bags so all are the same height. Use ties to close the bags, dig a trench to hold them side by side, and cover them with dirt until just the tops are showing. Water the soil above the bags and cover coach sale handbags usa it with a board or stones to keep animals away. After four weeks, have students dig up the bags. Determine which bag and enclosed items have decomposed the most.
Biofuels those made from organic materials have been portrayed as the fuels of the future. To coach sale usa outlet determine how much gas can be produced from decaying materials, ask students to obtain three clean soda bottles, a couple of cups of cow manure, grass clippings, mashed bananas, coach sling bags on sale
three balloons and some distilled water. Add a few ounces of
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